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8th Grade Mid-term review Flashcards | StudBud
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8th Grade Mid-term review
Density is the greatest
Mountain ranges in the middle of the oceans are called
8th Grade Mid-term review
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1
Mountain ranges in the middle of the oceans are called
mid-ocean ridges
tall mountains
sediment
rift valleys
2
Density is the greatest
in the inner core
in the mantle
on the oceanic crust
in the out er core
3
Alfred Wegener proposed
theory of pangaea
law of gravity
theory of continental drift
theory of plate tectonics
4
The process where new oceanic crust forms along a mid-ocean ridge and older crust moves away?
convection currents
plate tectonics
sea floor spreading
continental drift
5
The ocean floor was mapped in detail in
WW II
The cold War
WW I
The Vietnam war
6
What three clues did Wegener find when researching to support his continental drift theory?
climate, fossil, rock
animal, rock, fossil
ocean, rock, animal
ocean, climate, rock
7
The layer of the Earth that produces the magnetic field of the Earth is the
Crust
mantle
outer core
inner core
8
What is the mechanism to explain how continents move?
continental drift
relativity
plate tectonics
Sea floor spreading
9
What is the inner layer of the Earth called?
outer core
mantle
crust
inner core
10
The sea floor is completely flat
True
False
11
The Calendonian mountain range from __ ___ connects to the _________ mountains in N. America
South America, Andes
South America, Rocky Mountains
North America, Appalachians
North America, Rocky Mountains
12
The Atlantic Ocean is getting
bigger
smaller
13
Wegener suggested that the climate of S. America was much warmer than it is today.
True
False
14
Pangaea began to break apart
4 mya
225 mya
1.5 bya
542 mya
15
The thickest layer of the Earth is the
crust
mantle
inner core
outer core
16
What was missing in Alfred's evidence for Continental Drift?
a description of Pangaea
lack of fossil clues
a mechanism for plate movement
enough clues
17
The lithosphere includes
upper mantle and crust
continental crust only
upper asthenosphere and mantle
upper core and asthenosphere
18
Sediment is ________ away from the mid-ocean ridge and _________ near it.
thinner, thicker
thicker, thinner
19
What was the name of the piece of technology that scientists used after WWII to map ocean floor
echo sounder
sonar
seafloor sounder
radar
20
What is the smooth plain in the ocean floor called?
abyssal plain
bismal planes
abissil plain
abysmal plain
21
What was the evidence in the rocks to show that the sea floor was spreading?
a lot of lead
magnetic signatures
volcanic rocks
glacial grooves
22
Antartica used to be a _____ climate 225 million years ago
warm and wet
cold and freezing
cold and dry
warm and dry
23
The soft layer directly below the lithosphere is the
mantle
asthenosphere
soft crust
outer core
24
This layer is divided into 3 regions and is hot semisolid rock where convection currents occur.
outer core
mantle
lithosphere
asthenosphere
25
What type of rock forms oceanic crust?
rhyolite
limestone
andesite
basalt
26
North America is moving towards
South America
The north pole
Europe
Asia
27
Which layer of the Earth contains convection currents?
asthenosphere
outer core
inner core
mantle
28
As the ocean crust gets closer to the land it gets
thicker
older
younger
more magnetic
29
The thinnest layer of the Earth is the
mantle
outer core
lithosphere
crust
30
Which is the thicker layer?
Continental crust
Oceanic rust
31
We are currently in
abnormal polarity
regular polarity
normal polarity
reversed polarity
32
Scientists thought......
Alfred Wegener was a crazy man
Wegener was the most brilliant man ever
Alfred's theory was revolutionary
Wegener should get a Nobel prize
33
Which is the correct order from outside to inside?
outer core, mantle, crust, inner core
inner core, outer core, mantle, crust
crust, mantle, outer core, inner core
Mantle, inner core, outer core, crust
34
Where is the youngest seafloor found?
on the abyssal plain
at the beach
on the volcanoes
at the mid-ocean ridge
35
Which layer of the Earth is liquid?
mantle
lithosphere
outer core
outer mantle
36
Which two coasts fit together like puzzle pieces?
Western Africa and Western North America
Asia and Europe
West coast North America and Japan
Eastern S. America and Western Africa
37
Hot, malleable semi-liquid layer in the upper mantle where the plates of the lithosphere float.
core
asthenosphere
lithosphere
mantle
38
What fossil clue did Wegener find?
Itchyopterus
Tanganea
Allosaurus
Glossopteris
39
The oceanic crust is thicker than the continental crust and less dense.
True
False
40
Wegener found ___, deep scratches in the rocks made is rocks as glaciers moved across land
plant fossils
ice bergs
valleys
glacial grooves
41
The _________ ocean crust is found near the continental shelf
newest
oldest
